Jens peter



JENS PETER HANSEN, OF COPENHAGEN, DENMARK.

PACKING OF PHOTOGRAPHIC RAW FILMS.

Specification of Letters Patent.

Patented May 27, 1919.

Application filed December 10, 1918. Serial No. 266,170.

To' all whom it ma concern.

Be it knownthat I, JENS PETER HANSEN, a subjectof the King of Denmark, and resident of Copenhagen, 10 J acobys Alle, Deni'nark, have invented certain new and useful Improvements in Packing of Photographic Raw Films, of which the following is a specification. i The ni'aiii object of'my invention, which tel- 1 3 0 pe photogiiiphic F films,- is toc'onibihe the special, advantages of the welrk ewn rollefilnipacking viz.: the ability er inserting the film by daylight in the developifig apparatus with the advant age, which the Well known form of packing,

mpacks, (a pack of film-sheets) presents in proportion to roll-film, vi'z.: to allow the use of ground glass in the camera, and besides to cohibine this with the advantageswhich every single-enveloping of films, known up to 'now, presents inproporti'on to the two aforesaid, viz; that ordinary orthochi'oi'natic films may be used at pleasure, that the packihg I nay be sold singly and is easier transportable, that development may be undertaken at any time without it being necessary to awaitthe taking of the remaining films or to uhdert'ake uhii'it'ended exposure takings on these, only in order to be able to e mnieneethe developing, and finally, that the film's may at pleasure be developed singly (likewise as by pack-films, but in contrast to roll-films) so that they may be given different treatment iii order to adjust exposure errors. 7 i

H Further the invention aims at avoiding the use of adapter (a special holder or small base for the envelop), which is as a rule used pack-films and'niost of the single-packihgs, asitjm'ay be used with such one, but is especially intended to be laced in canieras with a back frame 0 special form (hinged and with springy ground-glassframe, but maybe used with'a'ny type, magazine cameras excepted. It should however, be noted that removable ground glass may also be used, however, ground-glass is of course not absolutely necessary. Besides the combination of all the advantages aforementioned, the envelop in question possesses for one thin further the following superioritie s. It is easy to manufacture, cheap, absolutely opaque, and secures'the film so that the lies plainly and smoothly during the 'p e't d that it ay be beat? and, for r t b6 fi riedmthe pocket m a pa k book without suffering damage. This is for example not the case with the single envelope, wlnch are provided with tiny plate edges, as

these are liable to be cracked or bent. Tin

plate edges also present the inconvenience, that if the cardboard of the envelop stretches underinfiuence of damp air, the tinned edges do not follow, by, which the cardboard and with it the film winds. 4

Finally should be mentioned, that the packing in question is considerably easier to insert and takeout of the camera than both roll and pack-films, as also, that by the use ofthis packing owing to the fact, that it maybe sealed-the danger ofexp'osing the same film twice is avoided. Such double exposure often happens by roll-films, when it is. forgotten to turn an unexposedpart of film forward before the exposing, Likewise the danger of parts of the film remaining unexposed or exposed twice, for example, whena too long or too short piece of film is rolled up on the receiving bobbin, is avoided. k 4 H p A Besides the packing, like. all other filmpacking may, of course, be inserted and taken out of the camera by full daylight,

and it may-by a slight modificationalso be used for plates, which may then be bought ready packed in the same manner as films. The developing, fixing and also the washing takes place in a developing apparatus, specially constructed for the packing.

The inventionis 'shownon the drawing, where Figure 1 shows the back plate of the packing in unfolded state with dotted bendin lines, v 7

ing. 2 shows a from View of the packing,

Fig, 3-is a longitudinalsection,

Fig. ,4 shows modified forms of execution with inlaid strip carriers for the use of glass plates, and I r 1 Fig, 5 -shows a form of execution of an inlaid strip carrier shown in Fig. 4 seen from'above. a

The packing consists of a back plate 1, of opaque thick paper or the like, the form and size of which will as a rule depend on the size of films current, with .a holding ribbon 6 and a cover plate 9; and two long edges 2 and 3 of the back plate are bent, and the one short edge a is then bent (these bendings may be fastened to each other), so that a somewhat projecting edge 5 arises, and along the opposite short edge of the connected by a pasted ribbon 6. --Whereby an envelop is formed, which may take up the film-sheet 7, which is kept in its place by the bendings 2, 3, and 4, the ribbon 6 and a bending 8 of the short edge of the back plate, which bending is applied under the ribbon.

Between the film 7 and the three bendings 2, 3 and 4 and the ribbon 6 the carton cover-plate may be inserted. This consists of a plate of thick paper or the like of nearly the same breadth as the film, its one short edge has a bending 10, which when the cover plate is drawn out, will cooperate with the opposite bending Son the back plate, and prevent the cover plate from being drawn perfectly out, likewise that opaqueness and lighttightness during'the exposure is thereby secured.

The opposite short end of the cover-plate has a hasp or tongue 11, which, when the cover-plate is pulled down and-has closed for the film, may be bent down over the back side of the back platein order to attain lighttightness-and be sealed there, besides it serves as a fingerhold during the displacement of the cover plate.

When a taking is to be made, and the lens is adjusted, the closed film-envelop is inserted into the camera, which may, for example, be done thereby, that the backframe of the camera is hinged, and the ground-glass applied in springing manner, so that the envelop may be introduced after the back frame having been clapped back (after which the seal onthe envelop is broken, the back frame is clapped to, and

era with a corresponding edge, which thereby keeps the envelop fast during the drawing up of the cover plate, so that the usual manipulations for this purpose are avoided.

,When the taking has been finished,the'

cover plate is pulled back, so that the exposed film is covered light-tight, and the envelop is then taken out of the camera, whereupon, that the back frame is clapped back, so that the edge 5 gets free of the corresponding edge in the camera. The envelop may then be sealed again, but in a manner which differs from the former seal- The bendings 2 and 3 form a guide for the cover plate during its displacement, and owing to the bending 4 being placed above the bendings 2 and 3, it springs itselftogether with the edge 5somewhat away from the back plate, 1, by which (when the camera is constructed insuch a manner,

that the bending 4 has plenty of room in task to remove dust from the surface of the film, in that it slides on over this, when the cover plate is drawn up.

The hasp or tongue 11 serves besides for the purposes mentionedby its tongued form also for the introduction of the envelop in the developing apparatus, and the ribbon 6 serves partly as a guide for the cover plate 9 during its displacement for covering and uncovering of the film 7, partly it contributes to secure, thatthe cover platewhen the envelop is manipulated outside the camera with broken sealremains in its place, light-tight closing to the film, and finally it serves tooby means of its thickness and by the thickenings produced on of it in order .to keep the glass plate in its place in relation to the light-opening, as the glass-plate 13, must always be somewhat smaller than the film size, intended for the same picture size.

It is obvious that it is not necessary to use one of the short sides for placing of the cover plate, as this, as well as the corre sponding form of execution of the envelop may be arranged as occasion may require,

likewise as the film of course need not to fill out the whole space in the envelop, but

may be smaller, and surrounded by a frame, which fits within the. said bendings, and besides the invention may be varied in different ways, without the principle of the.

invention being deviated from. 2

Having now described my invention, I desire to secure by Letters Patent 1. Film. envelop of thick paper or the like, with a back plate with catching edges and a slidable cover plate, characterized by a back plate 1 with four bent edges 2, 3, and 4, and 8 and a holding ribbon 6 or the like, all of paper or the like in connection with a cover plate 9 with bent edges 10, also of paper, which by the drawing out of the cover plate cooperates with thebending 8, and which has also a bent edge 11.w

2. Film envelop accordingv to claim 1,

thereby characterized, that the bending 4;

is placed on the outside of; the lower ends of the bendings 2 and 3, which are also bent does not form any hindrance for the pulllike 4, and has a projecting edge 5, which ing in of the cover plate, free room in the is springy, and Which is intended to coopcamera for the edge 5 supposed.

erate with corresponding hooks in the back In testimony whereof I affix my signa- 5 frame of the camera during the drawing out ture in presence of two Witnesses.

of the cover plate 9, so that the envelop w cannot follow, While the bending 4, by sit- JENS PETER HANSEN ting outside on the bendings 2 and 3 as well Witnesses:

as by the springing, is raised somewhat E. STEOKHAHN, 10 from the back plate 1, so that the edge 5 E. THORKELIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

